1 /* Multiple versions of memcmp
2 Copyright (C) 2010 Free Software Foundation, Inc.
3 Contributed by Intel Corporation.
4 This file is part of the GNU C Library.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 #include <init-arch.h>
24 /* Define multiple versions only for the definition in libc. */
29 .type memcmp, @gnu_indirect_function
31 cfi_adjust_cfa_offset (4)
32 cfi_rel_offset (ebx, 0)
33 call __i686.get_pc_thunk.bx
34 addl $_GLOBAL_OFFSET_TABLE_, %ebx
35 cmpl $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx)
37 call __init_cpu_features
38 1: leal __memcmp_ia32@GOTOFF(%ebx), %eax
39 testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features@GOTOFF(%ebx)
41 leal __memcmp_ssse3@GOTOFF(%ebx), %eax
42 testl $bit_SSE4_2, CPUID_OFFSET+index_SSE4_2+__cpu_features@GOTOFF(%ebx)
44 leal __memcmp_sse4_2@GOTOFF(%ebx), %eax
46 cfi_adjust_cfa_offset (-4)
53 .type memcmp, @gnu_indirect_function
54 cmpl $0, KIND_OFFSET+__cpu_features
56 call __init_cpu_features
57 1: leal __memcmp_ia32, %eax
58 testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features
60 leal __memcmp_ssse3, %eax
61 testl $bit_SSE4_2, CPUID_OFFSET+index_SSE4_2+__cpu_features
63 leal __memcmp_sse4_2, %eax
69 # define ENTRY(name) \
70 .type __memcmp_ia32, @function; \
72 __memcmp_ia32: cfi_startproc; \
76 cfi_endproc; .size __memcmp_ia32, .-__memcmp_ia32
79 # undef libc_hidden_builtin_def
80 /* IFUNC doesn't work with the hidden functions in shared library since
81 they will be called without setting up EBX needed for PLT which is
83 # define libc_hidden_builtin_def(name) \
84 .globl __GI_memcmp; __GI_memcmp = __memcmp_ia32
88 #include "../memcmp.S"